Abstract: A buttonhole sewing machine for the production of buttonholes on a work-piece comprises a thread feeding mechanism on the path of a needle thread which is fed in a direction of delivery. The thread feeding mechanism comprises a pivotal thread lever which has an opening for the needle thread to be led through. Further, the thread level is drivable by a triggerable positioning motor to pivot between a zero position and several positions of thread extraction.

Abstract: A buttonhole sewing machine for the production of a group of at least two buttonholes of varying design and/or size comprises devices for the entry, storage and processing of information on the varying design and/or size of the group of buttonholes and a device for triggering the drives for the successive production of buttonholes on the workpiece.

Abstract: A buttonhole sewing machine comprises a needle thread feeding mechanism, in which the needle thread is guided over a cam disk, which performs a rotation during two stitches of the needle. Along its periphery, the cam disk has such a curvature that tensioning and releasing the needle thread complies with the requirements of alternately sewing a single thread chain stitch and a double thread chain stitch during the sewing of a zigzag buttonhole seam.

Abstract: A cutting device in a sewing machine for creating a slit opening for a buttonhole in a workpiece. First and second tool parts are spaced apart from each other in an open position and can be brought together in a closed position. One tool part has a block and the other tool part has a cutting edge. The block is formed in the shape of a strip, is accepted into a slit located on the sewing machine and is attached there with a clamping device. A slit opening can be created in a workpiece in a block-cutting mode by the cutting edge and the block. The cutting device can also be used for making a slit opening in a workpiece in a slit-cutting mode by removing the block and providing a different cutting edge, which can be performed in a simple manner.

Abstract: An automatic sewing machine comprises a folding device and a guiding and feeding device for a folded workpiece and a main workpiece on which to sew the folded workpiece. The folding device comprises an outer frame with creasing modules which have folding bars. The creasing modules are mounted on the outer frame in a manner adjustable in their direction of extraction and approximately crosswise thereto.

Abstract: An eyelet buttonhole sewing machine has a housing with a stand and an arm. A table for carrying an article being sewn is driven in two mutually perpendicular directions (x, y) on the housing. A clamp for the article being sewn is fastened on the table. A needle bar which is mounted in the arm, is driven so as to move up and down and has a needle at its lower end. The clamp for the article being sewn has two arms fastened on a pedestal connected to the table, each arm having a clamping plate provided to bear on the article being sewn. The fastening points of the two arms on the pedestal are substantially adjacent to one another, and both arms are angled in such a manner that their fastening points are offset to the same side of the longitudinal axis of the arm.

Abstract: A sewing installation for the production of a lined pocket opening on a workpiece comprises a stand on which a working plate is supported. A cutting device for the production of corner cuts in the workpiece is disposed underneath the working plate. This cutting device is held on a support which lodges in the stand pivotally about an axis so that the cutting device can be moved into a position in which it is free from the working plate.

Abstract: A sewing machine having a table, driven in two directions by two motors and accommodating material to be sewn, sewing tools, and a cutting device for producing a buttonhole in the material to be sewn. The buttonhole is provided with an incision and is bounded by zigzag stitches of a buttonhole bead, running around the incision. The incision is produced either before or after the sewing of the buttonhole bead. The sewing tools include a needle bar, which is driven up and down and also oscillates in the horizontal direction, and a needle, which is provided at the bottom end of the needle bar and interacts with a looper mounted in the base plate. The sewing tools are drivable in a rotatable manner by a third motor. The sewing machine has a control device, from which various buttonhole shapes stored therein can be retrieved, a device for switching from the pre-cutting mode to the post-cutting mode, and a needle-oscillating device driven by a fourth motor and producing the zigzag stitches.

Abstract: A sewing machine with a table (9) driven by two motors (60, 80) in two directions (x, y) and receiving sewing material (36), with sewing implements and with a cutting device (34) for producing, in the sewing material (36), a buttonhole (28) which is provided with an incision (32) and which is delimited by zigzag stitches of a buttonhole bead (26, 27; 26', 27') which run around the incision (32), the incision (32) being produced before or after sewing the zigzag stitches. The sewing implements include a needle bar (4), driven up and down, and oscillating in the horizontal direction to form the zigzag stitches, and a needle (6), which is provided at the lower end of the needle bar (4) and which cooperates with a looper (11) mounted in the baseplate (12). The sewing implements are further driven in rotation by a third motor (13). The sewing machine also includes a control unit (90), which can store various buttonhole shapes and control the other components.

Abstract: A sewing machine having a machine arm, a rest for the material being sewn and a device for producing buttonholes, which comprises a cutting knife and a plurality of cutting blocks of respectively different lengths which are arranged on a common carrier. The buttonhole device is acted upon by an actuating device that can be moved from an upper position into a lower position, the cutting knife is arranged in a stationary manner underneath the sewing material, and the cutting block is lowered by the actuating device onto the cutting knife.

Abstract: A device for individualizing and feeding individual conveying carriers into a revolving hanging conveyor system. The individualizing device contains a rotatably driven spindle provided with grooves on the spindle's surface, wherein the pitch of each groove increases in the direction of conveyance. The feed device includes the individualizing device and a transfer conveyor, wherein the speed of conveyance of the transfer conveyor is adjustable.

Abstract: An apparatus for the transfer of a piping strip from a preparation station on to a workpiece comprises a preparation table and a gripping mechanism to be lowered thereon. In the preparation table, provision is made for a cutting device with a knife carrier having several knives which, by a single knife-driving mechanism, can be elevated from a position lowered underneath the supporting surface of the preparation table and while making cuts, can be guided through the piping strip.

Abstract: A method and apparatus for conveying material hanging on hangers. The material is transported from a loading region to a conveyance region, and then to a delivery region. Grip units of various lengths are formed by combining individual materials into groups. A theoretical maximum length for a grip unit is established. Clock pulses are produced in the conveyance region and are counted. Grip units stowed in the loading region are individualized to form well-defined spaces between the materials. Individualized grip units fed to the conveyance region are switched into the conveyance region when a gap sufficiently large to accommodate the grip unit is present in the conveyance region, determined by the maximum length established and counting of the clock pulses. The distance to be moved by the grip unit in the conveyance region to reach its destination is established, and progress of the grip unit is tracked.

Abstract: An actuating device (54) for lifting the presser foot (53) of a sewing machine. A piston (14) having a piston rod (15) is supported on the bearing (13) which guides the presser foot support rod (18). The presser foot support rod (18) is biased against the sewing material by a spring (40). The piston (14) is surrounded by a cylinder (26). The piston (14) with the piston rod (15) and the cylinder (26) form a piston-cylinder drive for actuation by compressed air, to urge the piston rod (15) against the force of the spring (40) and thereby lift the presser foot (53) off of the sewing material. The actuating device (54) has two set screws (42, 45) which respectively control the spring force acting on the presser foot and the distance the presser foot is raised by the actuating device. Two embodiments are described.

Abstract: A knee-operated switch for a working machine, the switch including a carrier supported to the machine and a profile extending off the carrier at an angle to the profile. The profile includes first and second elongate, parallel electric contact strips that are normally separated. Sheathing over at least one of the strips is deflectable to in turn deflect the contact strips into engagement. Support strips support the contact strips normally apart until the contact strips are deflected together. A flexible elastic housing over the sheathing and the strips is deflectable to deflect the sheathing to move the contact strips together. The switch profile extends over a length so that actuation can take place at different actuating points along the profile.

Abstract: A sewing machine, in particular a buttonhole sewing machine, is equipped with needle-thread-clamping scissors which have a lower half provided with a cutting edge at its tip portion. They further have an upper half pivotal relative to the lower half and having a cutting edge at its tip portion. Further, they have a clamping jaw to be pressed elastically on the tip portion of the upper half for clamping and holding a tail piece of a needle thread. The upper half can be pivoted in such a way that a receiving opening for the needle thread is formed in an opened position of the scissors, whereas, in a closed position, the needle thread is cut and the tail piece of the needle thread is clamped and retained between the upper half and the clamping jaw. The upper half can further take a third position in which the tip portion of the upper half is free from the clamping jaw and the tail piece of the needle thread is released.

Abstract: An automatic sewing apparatus comprises a workpiece holder which is designed for manipulation of a pocket flap. It comprises a flap clamp and a transfer clamp and a clamp. During the sewing of a first flap seam, the flap is held by the flap clamp and the clamp. In this case, the transfer clamp is positioned under the flap. Then the flap clamp is released and the clamp is disengaged and simultaneously the transfer clamp is displaced such that on the one hand the flap is folded down over the first flap seam and is simultaneously held in vicinity to the second flap seam to be produced.

Abstract: A sewing machine comprises a holding device, by means of which the front end of the needle thread can be clamped and held. Further, a cutter is available, by means of which the front end of the needle thread can be cut off directly over the workpiece.

Abstract: A conveyor pocket for a hanging conveyor system, in particular for the transport of conveyor articles hanging on hangers, having a pawl (3) which is arranged swingably in a base body (2) and is provided for holding in each case only one carrier on its hook-shaped head region (hook 20), the pawl (3) having an extension (4) protruding from the base body (2) for the swinging of the pawl (3) and thus the opening of the conveyor pocket (1), is characterized by the fact that the pivot axis (7) of the pawl (3) is arranged behind the resting point (15) of the hook (20) on the pawl (3) as seen in direction of transport (T).

Abstract: An adapter for use with a hanging conveyor system in which articles hanging on hangers and particularly articles of clothing, are transported for sorting or ordering by means of a conveyor along a transport path. The adapter is codable with data concerning the articles. The adapter is insertable between each article hanger provided with a hanger hook and the conveyor means. The adapter has a hook-shaped head region and a receiving region located below the head region. The receiving region has at least one section having a U-shaped cross section formed by an upward-extending arm. The receiving region contacts the hanger hook over such a region that the hanger hook, once inserted, will not twist in the receiving region. In a preferred embodiment, the receiving region is made up of two sections that are adjacent to each other, forming between them an intermediate space. Methods and arrangements for automatically loading hangers into and unloading hangers from the adapters also are provided.